/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id: QName.java,v 1.2.4.1 2005/09/02 11:45:56 pvedula Exp $
 */

package com.sun.org.apache.xalan.internal.xsltc.compiler;

/**
 * @author Jacek Ambroziak
 * @author Santiago Pericas-Geertsen
 * @author Morten Jorgensen
 */
final class QName {

  private final String _localname;
  private String _prefix;
  private String _namespace;
  private String _stringRep;
  private int _hashCode;

  public QName(String namespace, String prefix, String localname) {
    _namespace = namespace;
    _prefix = prefix;
    _localname = localname;

    _stringRep =
        (namespace != null && !namespace.equals(Constants.EMPTYSTRING)) ?
            (namespace + ':' + localname) : localname;

    _hashCode = _stringRep.hashCode() + 19; // cached for speed
  }

  public void clearNamespace() {
    _namespace = Constants.EMPTYSTRING;
  }

  public String toString() {
    return _stringRep;
  }

  public String getStringRep() {
    return _stringRep;
  }

  public boolean equals(Object other) {
    return (this == other)
        || (other instanceof QName
        && _stringRep.equals(((QName) other).getStringRep()));
  }

  public String getLocalPart() {
    return _localname;
  }

  public String getNamespace() {
    return _namespace;
  }

  public String getPrefix() {
    return _prefix;
  }

  public int hashCode() {
    return _hashCode;
  }

  public String dump() {
    return "QName: " + _namespace + "(" + _prefix + "):" + _localname;
  }
}
